[builtins] Introduce proper Float64Cos and Float64Sin.

src/compiler/machine-operator-reducer.cc

Index: src/compiler/machine-operator-reducer.cc
diff --git a/src/compiler/machine-operator-reducer.cc b/src/compiler/machine-operator-reducer.cc
index 07d6820f069ebcf4d878269770fb6abed934784c..095a95204e3af1e36892c2b10410562fe8769d03 100644
--- a/src/compiler/machine-operator-reducer.cc
+++ b/src/compiler/machine-operator-reducer.cc
@@ -399,6 +399,10 @@ Reduction MachineOperatorReducer::Reduce(Node* node) {
     case IrOpcode::kFloat64Atanh: {
       Float64Matcher m(node->InputAt(0));
       if (m.HasValue()) return ReplaceFloat64(base::ieee754::atanh(m.Value()));
+    }

[mvstanton, 2016/06/17 13:51:19]

Missing break

+    case IrOpcode::kFloat64Cos: {
+      Float64Matcher m(node->InputAt(0));
+      if (m.HasValue()) return ReplaceFloat64(base::ieee754::cos(m.Value()));
       break;
     }
     case IrOpcode::kFloat64Exp: {
@@ -434,6 +438,10 @@ Reduction MachineOperatorReducer::Reduce(Node* node) {
     case IrOpcode::kFloat64Cbrt: {
       Float64Matcher m(node->InputAt(0));
       if (m.HasValue()) return ReplaceFloat64(base::ieee754::cbrt(m.Value()));
+    }
+    case IrOpcode::kFloat64Sin: {
+      Float64Matcher m(node->InputAt(0));
+      if (m.HasValue()) return ReplaceFloat64(base::ieee754::sin(m.Value()));
       break;
     }
     case IrOpcode::kChangeFloat32ToFloat64: {